99 mustang fuel relay location

dmckee · 01-01-2004, 05:31 PM

My son has a 99 aniv. edition V6. He's in florida in the navy and I'm in Indiana
He doesn't have any books for the car.
I need to know where the fuel relay is located on the car..

Thanks.... Dan

84LX89GT · 01-05-2004, 04:28 PM

In '99 the 3.8L mustangs had a fuel pump driver module instead of an actual relay, and it communicates with the PCM to determine fuel pump pulse width modulation for the proper fuel pressure (returnless fuel system). Usually the fuel pump driver module can be found underneath the rear (bottom) seat, but i'm not exactly sure about mustangs.
If he's having problems with fuel the first thing i'd look at is fuses, then the Inertia switch in the right side door kick panel, then test the pump before getting into testing the modules.

01-01-2004, 05:31 PM	#1
dmckee Registered Member Join Date: Jan 2004 Posts: 1	99 mustang fuel relay location My son has a 99 aniv. edition V6. He's in florida in the navy and I'm in Indiana He doesn't have any books for the car. I need to know where the fuel relay is located on the car.. Thanks.... Dan

01-05-2004, 04:28 PM	#2
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	In '99 the 3.8L mustangs had a fuel pump driver module instead of an actual relay, and it communicates with the PCM to determine fuel pump pulse width modulation for the proper fuel pressure (returnless fuel system). Usually the fuel pump driver module can be found underneath the rear (bottom) seat, but i'm not exactly sure about mustangs. If he's having problems with fuel the first thing i'd look at is fuses, then the Inertia switch in the right side door kick panel, then test the pump before getting into testing the modules. __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

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